Read the following passage and choose the item (a, b, c, or d) that best answers each of the questions about it.
Tooth decay is a big problem nowadays. The amount of sugar in our food is increasing. Doctors and dentists now know that sugar is the main cause of tooth decay. Eskimos’ teeth, for example, started to decay when they began to eat sweeter foo
Long ago doctors did not like to treat people’s teeth. Barbers and black-smiths looked after people’s teeth and pulled them out when they decaye Some people thought toothache was a punishment from the gods.
decay (n/ v) (tình trạng) sâu (răng)
increase (v) gia tăng
cause (n) nguyên nhân
treat (v) chữa
punishment (n) sự trừng phạt
Who looked after people’s teeth in the past?
doctors barbers blacksmiths b & c